Pith Number

pith:F5SC2QOK

pith:2016:F5SC2QOKATMBECRXOQ26MS2Y3P

not attested not anchored not stored refs pending

Simultaneous penalized M-estimation of covariance matrices using geodesically convex optimization

Ami Wiesel, David E. Tyler, Esa Ollila, Ilya Soloveychik

arxiv:1608.08126 v1 · 2016-08-29 · stat.ME · stat.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F5SC2QOKATMBECRXOQ26MS2Y3P}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:07:48.633714Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f642d41ca04d8120a377435e64b58dbe49f2c01cc26517c9fe856b2d45eea95

Aliases

arxiv: 1608.08126 · arxiv_version: 1608.08126v1 · doi: 10.48550/arxiv.1608.08126 · pith_short_12: F5SC2QOKATMB · pith_short_16: F5SC2QOKATMBECRX · pith_short_8: F5SC2QOK

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/F5SC2QOKATMBECRXOQ26MS2Y3P \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 2f642d41ca04d8120a377435e64b58dbe49f2c01cc26517c9fe856b2d45eea95

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa2931a0771df1103bac11c2d3e002001bc0c3f7c117ec173f24900c359739b2",
    "cross_cats_sorted": [
      "stat.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2016-08-29T16:11:08Z",
    "title_canon_sha256": "e640fc8eff7ebfee5df572b412b1a4efd23492411d1e0531504cc2a93909c9a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.08126",
    "kind": "arxiv",
    "version": 1
  }
}